how to make a toroidal power transformer?

To make a toroidal power transformer, start by selecting the appropriate core material, typically ferrite or silicon steel. Cut the core into a toroidal shape and wind insulated copper wire around it, ensuring the primary and secondary windings are distinct. Use a precise number of turns for each winding to achieve the desired voltage transformation. Finally, connect the windings to the input and output terminals, ensuring proper insulation and safety measures are in place.